Low transmission fluid will not effect the hand shifter performance..to check your fluid let the vehicle run untill the temp reading is in the middle then shut it off.and within 90 seconds remove the stick wipe clean reinsert the stick remove again and see where wet mark ends

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Possible causes of OBD code P0780
- Low transmission fluid level - Dirty transmission fluid - Faulty shifting solenoid valve - Shifting solenoid valve harness or connectors - Shifting solenoid valve circuit is open or shorted The Error code is generally activated on detection of the following conditions: The P0780 codes is detected when no rotation change occurs between input (turbine revolution sensor) and output (revolution sensor) and shifting time is long or when shifting ends immediately or when engine revs up unusually during shifting.So check out these points and see if any are all help keep me posted

i had the same thing...It's the transmission. It's REALLY noticeable shifting from 1st to 2nd gear. I was able to get my transmission fixed for 900 bux. That wasn't even a replacement so i can imagine how much it would cost to get it replaced. The shifting will get worse. By the end of my "experience" it wouldn't shift from 1st to 2nd for about 5 minutes until i drove it around for a bit. THen it would "warm up" to the idea of shifting to 2nd gear.

the first common possibilty would be to check fluid level, if the fluid level is good, I would recommend changing the transaxle fluid and filter. if this does not correct the issue, a professional transmission repair person will need to diagnose for you, good luck!

hELLO SUPRA I HAD A 92 ACCORD EXACTLY THE SAME THERE IS A FUSE UNDER THE HOOD (PASSENGERSIDE) THAT WILL FIX THE PROBLEM BUT LOOSE THE AUTO SEATBELTS BUT IT WILL SHIFT PROPERLY . OTHEWISE IT IS A TCM PROBLEM . IF THAT DOESNT WORK EMAIL ME AT MRJLEE1980@YAHOO.COM

it has a problem with the second gear drum it cracks and does not fully engauge the n shifts to 3rd ..many honda owners also learn the 8 bucks a quart is the only fluid to pour in a honda..but remember 3 qaurts per drain and fill the tranny holds 7q ....it will take a case to do a drain flush...a high pressure flush will ruin a automatic tranny with alot of miles or metal deposits floating around inside..DRAIN AND FILL 3 QUARTS AT A TIME NO GASKET NEEDED ITS BUILT AND DESIGNED LIKE A MANUAL TRANNY

possibly due to low trans fluid pressure. the cooler in the radiator
may be plugged. to check, disconnect and bypass cooler with rubber line
& clamps. drive 2-3 miles. shifting OK now? install auxillary
cooler to bypass one in radiator. you can get one at auto-zone $30-$50.
may just need fluid & filter change, but more likely it's the
cooler. when they get plugged, either one, pressure drops alot.